# Service difficulty reports: N4501B A list on [N4501B](https://openairdocs.org/aircraft/N4501B.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. - [SDR EPUA2019020130001](https://openairdocs.org/sdr/EPUA2019020130001.md): Engine · multiple fail · Jan 30, 2019 · N4501B · Piper PA31350 · Engine (Reciprocating) > PILOT PERFORMED PRECAUTIONARY INFLIGHT ENGINE SHUTDOWN OF THE LEFT ENGINE DUE TO THE FOLLOWING: CHT INDICATING 500, OIL PRESSURE HIGH RED LINE, OIL TEMP CREEPING UP TOWARDS 200. ENGINE CONFIGURATION AS FOLLOWS: COWL FLAPS OPEN, MANIFOLD PRESSURE OF 20'. MAI - [SDR EPUA20180518001](https://openairdocs.org/sdr/EPUA20180518001.md): Landing Gear · malfunctioned · May 16, 2018 · N4501B · Piper PA31350 · Landing Gear Retraction/Extension System > PILOT REPORTED THAT THE LANDING GEAR WILL NOT EXTEND PROPERLY. ABLE TO EXTEND THE GEAR AND LANDED WITHOUT INCIDENT. OPEN. - [SDR EPUA201409272014](https://openairdocs.org/sdr/EPUA201409272014.md): Magneto · failed · Sep 27, 2014 · N4501B · Piper PA31350 · Magneto/Distributor > DURING FLIGHT, THE RT ENG BEGAN TO RUN ROUGH, THE RT CYLINDER HEAD TEMP WAS HIGH. THE ENG WAS SHUTDOWN & FEATHERED AS A PRECAUTION. ACFT LANDED WITHOUT FURTHER INCIDENT. DETERMINED THAT THE LT MAGNETO ON THE RT ENG WAS DEFECTIVE, FURTHER DETAILS ABOUT THE M - [SDR EPUA2014062214001](https://openairdocs.org/sdr/EPUA2014062214001.md): Bowl · cracked · Jun 22, 2014 · N4501B · Piper PA31350 · Hydraulic Filter, Main > LANDING GEAR DID NOT EXTEND NORMALLY, PILOT HAD TO UTILIZE EMER GEAR EXTENSION PROCEDURE. THE RT SIDE HYD FILTER BOWL HAD CRACKED & WAS LEAKING FLUID. AFFECTED BOWL WAS REPLACED & OPERATIONALLY CHECKED GOOD. - [SDR EPUA20131227001](https://openairdocs.org/sdr/EPUA20131227001.md): Downlock Switch · out of adjust · Dec 27, 2013 · N4501B · Piper PA31350 · Landing Gear Position and Warning > LEFT MAIN GEAR LIGHT DID NOT ILLUMINATE WHEN EXTENDING LG & THE GEAR HANDLE DID NOT RETURN TO NEUTRAL. THE GEAR UNSAFE LIGHT WAS ILLUMINATED. PILOT ABORTED & RETURNED TO THE MAINTENANCE BASE IN NOME. PERFORMED FLY BY TO VERIFY THAT THE GEAR WAS DOWN. ACFT - [SDR EPUA20131105001](https://openairdocs.org/sdr/EPUA20131105001.md): Regulator · leaking · Nov 1, 2013 · N4501B · Piper PA31350 · Heating System > RT ENGINE FUEL PRESSURE LOW AT 2000 RPM. MAINTENANCE TECH DISCOVERED THAT THE HEATER FUEL REGULATOR SHUTOFF VALVE (FRSOV) WAS LEAKING AND CAUSING THE RT ENGINE TO BE AFFECTED AS REGARDS TO FUEL PRESSURE. THIS PARTICULAR FRSOV HAD 14.6 OF TIME ON IT SINCE NE - [SDR EPUA20131029001](https://openairdocs.org/sdr/EPUA20131029001.md): Regulator · leaking · Oct 26, 2013 · N4501B · Piper PA31350 · Heating System > DURING INSPECTION IAW AD 2004-25-16 R1, THE FUEL REGULATOR SHUTOFF VALVE WAS FOUND TO BE LEAKING FUEL. - [SDR EPUA20120910001](https://openairdocs.org/sdr/EPUA20120910001.md): Switch · dirty · Aug 17, 2012 · N4501B · Piper PA31350 · Landing Gear Position and Warning > DURING APPROACH, AFTER LANDING GEAR SELECTED DOWN, RED LIGHT REMAINED ILLUMINATED, GREEN NOSE WHEEL LIGHT REMAINED EXTINGUISHED AND GEAR HANDLE DID NOT RETURN TO THE NEUTRAL POSITION. CYCLED THE GEAR ATTEMPTED WITH NO POSITIVE RESULT, DISCONTINUED APPROACH A - [SDR EPUA20120308001](https://openairdocs.org/sdr/EPUA20120308001.md): Distributor Blk · damaged · Mar 6, 2012 · N4501B · Piper PA31350 · Magneto/Distributor > RT ENGINE RUNNING ROUGH OUTBOUND, MX FORUND THAT NR 2 ENGINE RT MAGNETO WENT TO CROSSFIRING. ENGINE WOULD NOT RUN WITH THIS MAG IN THE ON POSITION, DISTIBUTOR BLOCK COMING APART. REPLACING MAGNETO. - [SDR FFS2007F00001](https://openairdocs.org/sdr/FFS2007F00001.md): Motor · failed · Dec 4, 2007 · N4501B · Piper PA31350 · Heating System > THE (HEATER FAIL) ANNUNCIATOR ILLUMINATED FOLLOWED BY AN OVERHEAT OR BURNING SMELL IN THE COCKPIT WHILE IN FLIGHT. RETURNED TO DEPARTURE FOR AN UNSCHEDULED LANDING. MAINTENANCE FOUND THE INSULATION ON THE WIRES ON THE HEATER MOTOR HAD OVERHEATED AND WERE HAR - [SDR 20010529CW012](https://openairdocs.org/sdr/20010529CW012.md): Pump · failed · Apr 27, 2001 · N4501B · Piper PA31350 · Fuel Boost Pump > PILOT REPORTED RT ENG SURGING AT HIGH POWER SETTINGS, WITH FULL FUEL FLOW FLUXUATIONS, 23-30 PSI FUEL PRESSURE FLUX, AND INTERMITTENT LOW PRESS FUEL WARNING LITE. INVESTIGATION REVEALED THAT THE RETAINING CLIP THAT SECURES RELIEF VALVE AND SPRING ASSY IN THE - [SDR 20010228CW008](https://openairdocs.org/sdr/20010228CW008.md): Regulator · leaking · Jan 24, 2001 · N4501B · Piper PA31350 · Heating System > THIS FUEL REGULATOR WAS INSTALLED NEW, AND WHILE PRESSURE TESTING STATIC ON GROUND, IT WAS FOUND TO BE LEAKING FROM SCREW ON TOP OF UNIT. - [SDR 20001219SH014](https://openairdocs.org/sdr/20001219SH014.md): Regulator · leaking · Nov 28, 2000 · N4501B · Piper PA31350 · Heating System > FUEL OBSERVED DRIPPING FROM DRAIN LINE. AFTER GROUND RUN OF ENGINE WITHOUT HEATER BEING USED. VALVE WAS REMOVED FROM AIRCRAFT AND 30 PSI SHOP AIR WAS APPLIED TO INLET WITHOUT POWER TO OPEN VALVE. LEAK CHECK FLUID WAS APPLIED TO VALVE BODY AND LEAK WAS FOUND - [SDR 20001219SH013](https://openairdocs.org/sdr/20001219SH013.md): Regulator · leaking · Nov 28, 2000 · N4501B · Piper PA31350 · Heating System > INSTALLED NEW FUEL REGULATOR SHUT-OFF VALVE. AFTER SEVERAL MINUTES OF OPERATION, VALVE BEGAN LEAKING AT BODY HALF. REMOVAL AND INSPECTION REVEALED ALL FOUR SCREWS THAT HOLD BODY HALF TOGETHER TO BE LOOSE WITH TORQUE SEAL IN PLACE. TIGHTENED SCREWS AND RE-TE - [SDR 20001204SH012](https://openairdocs.org/sdr/20001204SH012.md): Regulator Valve · leaking · Nov 28, 2000 · N4501B · Piper PA31350 · Heating System > INSTALLED NEW FUEL REGULATOR SHUT-OFF VALVE. AFTER SEVERAL MINUTES OF OPERATION, VALVE BEGAN LEAKING AT BODY HALF. REMOVAL AND INSPECTION REVEALED ALL FOUR SCREWS THAT HOLD BODY VALVE TOGETHER TO BE LOOSE WITH TORQUE SEAL IN PLACE. TIGHTENED SCREWS AND RETE - [SDR 20001204SH011](https://openairdocs.org/sdr/20001204SH011.md): Regulator Valve · leaking · Nov 28, 2000 · N4501B · Piper PA31350 · Heating System > FUEL OBSERVED DRIPPING FROM DRAIN LINE AFTER GROUND RUN OF ENGINE WITHOUT HEATER BEING USED. VALVE WAS REMOVED FROM AIRCRAFT AND 30 PSI SHOP AIR WAS APPLIED TO INLET WITHOUT POWER TO OPEN VALVE. LEAK CHECK FLUID WAS APPLIED TO VALVE BODY AND LEAK WAS FOUND T - [SDR 20001207SH003](https://openairdocs.org/sdr/20001207SH003.md): Regulator · leaking · Nov 15, 2000 · N4501B · Piper PA31350 · Heating System > FUEL WAS OBSERVED LEAKING FROM DRAIN TUBE. INVESTIGATION REGVEALED VALVE TO BE LEAKING FORM DIAPHRAGM PARTING SURFACE. VALVE BODY SCREWS WERE FOUND LOOSENED OVER TIME. SUGGESTED SELECTION OF ALTERNATE LOCKING DEVICE TO PREVENT RECURRENCE. (X) - [SDR 20001120SH038](https://openairdocs.org/sdr/20001120SH038.md): Valve · leaking · Nov 15, 2000 · N4501B · Piper PA31350 · Heating System > FUEL WAS OBSERVED LEAKING FROM DRAIN TUBE. INVESTIGATION REVEALED VALVE TO BE LEAKING FROM DIAPHRAGM PARTING SURFACE. VALVE BODY SCREWS WERE FOUND TO HAVE LOOSENED OVER TIME. SUBMITTER SUGGESTED SELECTION OF ALTERNATE LOCKING DEVICE TO PREVENT RECURRENCE. - [SDR 97ZZZX3752](https://openairdocs.org/sdr/97ZZZX3752.md): Hyd Power Pack · malfunction · Jul 9, 1997 · N4501B · Piper PA31350 · Hydraulic Pump (Electric/Engine), Main > EN ROUTE, PILOT REPORTS THE GEAR SELECTOR HANDLE NEVER RETURNED TO NEUTRAL. THE CIRCUIT BREAKER WAS OPEN AND (RED) GEAR UNSAFE LIGHT WAS ON. NO EMERGENCY ACTIONS, PILOT RETURNED SELECTOR TO NEUTRAL, RESET CIRCUIT BREAKER AND FLEW AT GEAR EXTENSION SPEED UNTI ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet' WHERE n_number = 'N4501B' AND registry_match = 'registration' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/aircraft/N4501B/reports --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.